Skip to content

Time Model

The Time Model is one of the fundamental concepts of the Insights Hub OEE application. It is a representation of the production time and various downtimes of a plant. It describes how the total time of a plant is being divided into different time categories, which represent how the time is being used in the plant. By default, the Insights Hub OEE application has configured three major time categories for the calculation of overall equipment effectiveness. Using these time categories, users can derive their own sub-categories.

The main time categories of the Insights Hub OEE application are:

  • Production Time: The Production time category accounts for all the run time of the machine or line.
  • Planned Stop: This category contains all stops that are scheduled for the production. That could be, for example, planned maintenance, a shift break, a holiday, or simply a weekend, where the machines and lines are not producing. These times are not considered for the calculation of OEE but are important for the calculation of the Total Effective Equipment Performance (TEEP). Furthermore, no OEE is calculated during planned stops.
  • Downtimes: Downtimes include all the various machine or line stop states that lead to lost productive time within their schedule. This typically includes all types of downtime, change-over, cleaning phases, supply chain-related issues, or internal faults. These stops are always classed as an Availability Loss unless it is a Microstop. In the case of Microstops, the user can decide whether it should be classed as an Availability or Performance Loss.

The following table shows which major time category impacts which KPI:

KPI Production Time Availability Loss Planned Stop
OEE X X
TEEP X
Availability X X
Performance X
Quality X
MTTR X X
MTBF X X

The formulas for the KPIs calculation are described in Section OEE Standard Formulas.

The example given below explains the time model:

Basics-timemodel

In this example, we have defined ten different time categories, which are inherited from the three major time categories:

  • Production time: Under Production time, we have only defined a one-time category called Run, this represents when the machine or line is operating.
  • Planned Stop: In this time category, we have defined multiple categories that stand for different stops in a factory, which are Holiday, Shift Break, Maintenance, and No Production. Whenever the machine status or configured calendar for a machine or line is in one of these time categories, then these times are counted towards the Planned stop and are not considered in the overall OEE calculation.
  • Downtimes: Under Downtimes, we have a fixed category called Microstops defined as short stops that are below the configured threshold. Microstops can be configured as either Availability or Performance loss by refering to Section Configuring Microstops. Other time categories represent typical Availability Losses. In our case, we have defined Cleaning, Run Down, Start-Up and Unplanned Downtime. Whenever we are in a machine or line state, that is represented by one of the above-mentioned time categories, then this time is counted towards Availability Loss.

The definition of the time model is a crucial step to evaluate and understand the collected machine status. For more information to set up the time model, refer Section Configuring Time Model.

The states defined under Production Time and Planned Stop can also be utilized in the Calendar configuration to describe the machine schedule. For more information, refer to Section Configuring Calendar.

The Reason Tree section shows how the underlying time model can be utilized to build custom reason trees.


Last update: September 30, 2024